Pile.



L. B. WELSH.

PILE.

APPLIOLTIDN FILED FEB. 20,1909. BENEWED SEPT. 26, 1910.

Patented NOV. 15, 1910.

UNITED sTATEs PATENT oEEIoE.

LoUIs E. WELSH, 0E PHILADELPHIA, `PENNsrjLvANIA,` AssIGNoIg EY 'DIRECT AND -MEsNE'AssIeNMENTs, To AMERICAN coNcnETE PILING coMPANY, or PHILA- DELPHIA, PENNSYLVANIA, A coEPoEA'rIoN 0E PENNSYLVANIA.

PILE.

Specification of Lettersfatent.

lImte'iugeii Nov. 15, 191e.

Application le. February 20, 1909, Serial No.479,142. RenewedSeptember 26, 1910. Serial No. 583,912.

'struct a.' pile with a substantially'tapered cylindrical concrete shell which is first introduced into the ground and then lledwithconcrete; the whole, when the concrete is set, forming a solid homogeneous pile.

In the accompanying drawings: is a sectional view of one form of pile made in accordance with my invention, and' Figs.

2 and 3, are views 'illustrating modifications embodying my invention.

My improved pile is made up of a series of sections or shells A of concrete which may be connected together in any suitable manner, and in the present instance rings of metal or other suitable material are. interposed between the sections and have shoul-y deredl flanges receiving the ends of the see'' tions.

. As shown in Figs. l and 3the sections or shells A are in the form of truncated cones, and their outer Wall may be of any taper desired, depending largely upon .the soil into which the pile is to be driven. A driving point B'is provided, which is `preferably of the same diameter as the end o the concrete shell resting upon it, although, if desired, it maybe larger than the shell. The driving point has two annular seats b b', one within the other and separated in the present instance by a flange b2, and' as clearly shown in the drawings, the shell A rests upon the may be a space between the shell and the driving form, or it may fit snugly within said shell. Preferably the driving form is provided with annular ribs or shoulders c Figure-1,

' crete shells.

yto engagedianges carriedv by the rings interposed between the concrete shells.

lIn. the structure shown in Fig. 1, the pile is made oa-series of concrete sections A, l:separated by tapered rings B, of metal orv A other material, forming in eleet a' continuation of the tapered pomt B. In the use of 'thispld the brunt ofthe thrustin ldriving will takenv by the -dr'iving point and the metallic rings, but the load will be support- 'ed not only byA the rings but also by the tapered pile sections. Whenthe pile is completed vby the filling of concrete, the rings, `are embedded in the concrete land add ystrength to the structure.

In some instances a conical pile may be made up of a series of cylindrical sections A', of an even diameter throughout, separated by rings B tapered on the outer side,

as illustrated in Fig. 2. In this instance, the driving point'and thev rings lform the openy ing, and the shells simply follow.

Inv the structure shown in Fig. 3, a pile having la single taper throughout is shown,- -made up of a series of tapering concrete shells4 with rings B2 of metal interposed between the same whose outer wall is in the same plane as the kconcrete sections. All of the metal rings are of substantially the same construction lnternally so that the same kind of a driving form maybe employed to enter v them into the ground. 1

The operation of forming my improved pile is as follows Tubular concrete sections of the desired taper are mounted on a driving Aform such as illustrated in Figs. 2 and 3 and entered into the ground; the initial pressure being taken by the driving point and form while the pressure due to the enlargement of the pile is taken by the con- These shells are reinforced and made-of such diameter that they can withstand this pressure. After the -shells have be'en entered .into the ground, the driving form is removed, leaving the shells and point section within the ground, and then the pile lcan be inspected.

ing thefload carried kbythe ile.` y Y yWhile I prefer to make t ievpoint `section able portion, as disclosed in my application last above mentioned, such ortion of the point' may be removed, r and i` it has reached bed-rock a portion of the earthunder the point can be removed and the space so made i for use -inrsoil havingy an underl strata of quicksand above bed-rock, andfwhere lit is not desired todrive through such qnicksand ontobed-rock. By the use of my invention,

a pile canbe driven into the upper strata which has good supporting .qualities and firmly held therein; thesurface friction on the pile` owing to its .conical shape, sustainof metal, steel, for instance, it may be made of reinforced concrete if desired, and any suitable reinforcingmembers may be inserted in the space inclosed by the Ashells Iafter the latter haye been driven in order to add strength-to thebodyof thepile.

I clai1r`1:, 1. A pile `having a driving point, a series of concrete shells, a series ofv rings interposed between the shells, and a body of concrete lling the center of the pile. f 2. A pile having a driving point, a plurality of concrete shells, a series of rings increasing in diameterfrom the point and 3. -A pile having a driving point, a series diameter from the oint, a series of rings separating said shels, land a body of con crete filling ythe centerof the pile.

c In testimony whereof, I have 'signed my name to this yspecifcatiomin the presence of two' subscribingvvitnes'ses. Y n v p n LOUIS E. "WELSEIv` Witnesses:` 'y i .l Jos. H. KLEIN,

- WM'. ABM."

v lseparated by said. shells, and. a' body of con crete-lling the center of the pile. i

fof concrete shells successively increasing 1n 

